JP5825559B2 - Gas tank - Google Patents

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JP5825559B2
JP5825559B2 JP2012231928A JP2012231928A JP5825559B2 JP 5825559 B2 JP5825559 B2 JP 5825559B2 JP 2012231928 A JP2012231928 A JP 2012231928A JP 2012231928 A JP2012231928 A JP 2012231928A JP 5825559 B2 JP5825559 B2 JP 5825559B2
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seal
liner
base
hole
gas
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JP2014084900A (en
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石戸谷　尽生
尽生 石戸谷
高見　昌宜
昌宜 高見
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Toyota Motor Corp
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/32—Hydrogen storage

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  • Pressure Vessels And Lids Thereof (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Description

本発明は、水素等のガスが充填されるガスタンクに関する。   The present invention relates to a gas tank filled with a gas such as hydrogen.

水素をはじめとするガスが充填されるガスタンクは、ガスバリア性を有する内側の樹脂ライナと、樹脂ライナの外周に配置されたＦＲＰからなる補強層との二層構造の容器本体を有しており、この容器本体の両端に口金が取り付けられている。   A gas tank filled with gas such as hydrogen has a container body having a two-layer structure of an inner resin liner having gas barrier properties and a reinforcing layer made of FRP disposed on the outer periphery of the resin liner. A base is attached to both ends of the container body.

この種のガスタンクに用いられる口金として、筒状部分と、この筒状部分から外周側に張り出すフランジ部とを有しており、樹脂ライナは、タンクの内部側からフランジ部を覆い、さらに、筒状部分の内周面または外周面の一部を覆うように設けられたものがある（例えば、特許文献１〜４参照）。   As a base used for this type of gas tank, it has a cylindrical portion and a flange portion projecting from the cylindrical portion to the outer peripheral side, and the resin liner covers the flange portion from the inner side of the tank, and There is one provided so as to cover a part of the inner peripheral surface or the outer peripheral surface of the cylindrical portion (for example, see Patent Documents 1 to 4).

特開平１０−３３２０８４号公報Japanese Patent Laid-Open No. 10-332084 特開２００９−５８１１１号公報JP 2009-58111 A 特開２０００−２９１８８７号公報JP 2000-291887 A 特開２０００−１６１５９０号公報JP 2000-161590 A

ところが、上記構造のガスタンクは、高圧ガスを充填するガスタンクとしては、口金と樹脂ライナとの間のシール性が十分に得られないおそれがある。
ここで、特許文献１，２のガスタンクでは、口金に締結するバルブが樹脂ライナに押し付けられることで高いシール性が得られるが、経時によって樹脂ライナが変形した際にシール性が低下してしまうおそれがある。 However, the gas tank having the above structure may not provide sufficient sealing performance between the die and the resin liner as a gas tank filled with high-pressure gas.
Here, in the gas tanks of Patent Documents 1 and 2, a high sealing performance is obtained by pressing a valve that is fastened to the base against the resin liner. However, when the resin liner is deformed over time, the sealing performance may be deteriorated. There is.

本発明は、上記事情に鑑みてなされたもので、優れたシール性を長期的に得ることが可能なガスタンクを提供することを目的としている。   This invention is made | formed in view of the said situation, and it aims at providing the gas tank which can acquire the outstanding sealing performance for a long term.

上記目的を達成するために、本発明のガスタンクは、樹脂製のライナと、該ライナの少なくとも一端に設けられた口金と、該口金に形成された貫通孔にねじ込まれて装着される締結部材とを備え、
前記口金は、前記ライナの肩部に外側から接するフランジ部と、該フランジ部における前記貫通孔側の縁部に形成された段部とを有し、
前記ライナは、前記貫通孔と連通する挿通孔と、該挿通孔の縁部が断面視Ｕ字状またはコ字状に屈曲されて前記段部に収容され、内周側が前記締結部材の前記口金への装着方向前方へ向かって次第に窄まるシール片部とされたシール部とを有し、
前記締結部材は、前記貫通孔に締結されることで前記ライナのシール部における前記シール片部に密着されるシール面を有し、
前記シール部は、前記締結部材のシール面によって前記シール片部が外周側へ押圧されて弾性変形される。 To achieve the above object, a gas tank according to the present invention comprises a resin liner, a base provided at at least one end of the liner, and a fastening member that is screwed into a through-hole formed in the base. With
The base has a flange portion in contact with the shoulder portion of the liner from the outside, and a step portion formed at an edge portion on the through hole side in the flange portion,
The liner includes an insertion hole communicating with the through-hole, an edge portion of the insertion hole bent into a U-shape or a U-shape in cross-section and accommodated in the stepped portion, and an inner peripheral side of the base of the fastening member A seal part that is gradually narrowed toward the front in the mounting direction to the seal part,
The fastening member has a seal surface that is brought into close contact with the seal piece portion of the seal portion of the liner by being fastened to the through hole,
The seal portion is elastically deformed by pressing the seal piece portion toward the outer peripheral side by the seal surface of the fastening member.

この構成のガスタンクによれば、締結部材が口金に装着されてシール面がライナのシール部におけるシール片部に入り込むと、断面視Ｕ字状またはコ字状のシール部のシール片部が拡径するように外周側へ押圧されて弾性変形する。すると、シール面方向へ向かってライナのシール部の復元力が生じる。これにより、シール片部を、シール部の復元力によって大きな面圧でシール面に密着させ、優れたシール性を長期的に得ることができる。
また、ガスタンク内にガスが充填されると、充填されたガスの圧力がシール部のシール片部におけるシール面との密着側と反対側に作用する。これにより、シール片部には、シール部の復元力による初期面圧に加えてガス圧による面圧がシール面方向に作用する。したがって、シール片部が、弾性力による初期面圧とガス圧でシール面に押し付けられて密着され、よって、優れたシール性をさらに長期的に得ることができる。 According to the gas tank of this configuration, when the fastening member is attached to the base and the seal surface enters the seal piece portion in the seal portion of the liner, the seal piece portion of the U-shaped or U-shaped seal portion in cross section is expanded in diameter. It is elastically deformed by being pushed to the outer peripheral side. Then, the restoring force of the seal part of the liner is generated toward the seal surface direction. Thereby, the seal piece can be brought into close contact with the seal surface with a large surface pressure by the restoring force of the seal portion, and excellent sealing performance can be obtained for a long time.
Further, when the gas is filled in the gas tank, the pressure of the filled gas acts on the opposite side of the seal piece portion of the seal portion that is in close contact with the seal surface. Thereby, in addition to the initial surface pressure due to the restoring force of the seal portion, the surface pressure due to the gas pressure acts on the seal piece portion in the seal surface direction. Therefore, the seal piece is pressed against and closely adhered to the seal surface with the initial surface pressure and the gas pressure due to the elastic force, and thus excellent sealability can be obtained for a longer period.

本発明のガスタンクによれば、優れたシール性を長期的に得ることができる。   According to the gas tank of the present invention, excellent sealing performance can be obtained for a long time.

本発明の実施形態に係るガスタンクの構造を説明するガスタンクの一端側における断面図である。It is sectional drawing in the one end side of the gas tank explaining the structure of the gas tank which concerns on embodiment of this invention. 口金へのバルブの装着の仕方を示すガスタンクの一端側における断面図である。It is sectional drawing in the one end side of the gas tank which shows the method of mounting | wearing with the valve | bulb to a nozzle | cap | die. 口金へのバルブの装着時の状態を示すガスタンクの一端側における断面図である。It is sectional drawing in the one end side of the gas tank which shows the state at the time of mounting | wearing of the valve | bulb to a nozzle | cap | die. 口金へのバルブの装着後の状態を示すガスタンクの一端側における断面図である。It is sectional drawing in the one end side of the gas tank which shows the state after mounting | wearing with the valve | bulb to a nozzle | cap | die. 変形例１に係るガスタンクの一端側における断面図である。10 is a cross-sectional view of one end side of a gas tank according to Modification 1. FIG. 変形例２に係るガスタンクの一端側における断面図である。10 is a cross-sectional view of one end side of a gas tank according to Modification 2. FIG.

図１は、内部に高圧ガス（例えば水素ガス）を充填保管するためのガスタンク１１を示すもので、このガスタンク１１は、合成樹脂製のライナ１２の外周側を、ガラス繊維や炭素繊維などからなる繊維強化樹脂層１３によって覆った構成のタンク本体１４を有している。   FIG. 1 shows a gas tank 11 for filling and storing a high-pressure gas (for example, hydrogen gas) inside, and this gas tank 11 is made of a synthetic resin liner 12 and is made of glass fiber or carbon fiber. A tank body 14 having a configuration covered with a fiber reinforced resin layer 13 is provided.

タンク本体１４の両端（図１では一端のみ図示）には、ライナ１２の挿通孔１２ａが形成された肩部１５に、口金１６が取り付けられており、バルブ（締結部材）１７が取り付け可能な口金１６を有する側がバルブ側とされ、その反対側がエンド側とされている。   At both ends of the tank body 14 (only one end is shown in FIG. 1), a base 16 is attached to a shoulder portion 15 in which an insertion hole 12a of the liner 12 is formed, and a base to which a valve (fastening member) 17 can be attached. The side having 16 is the valve side, and the opposite side is the end side.

次に、バルブ１７が取り付けられるバルブ側における口金１６のライナ１２への取り付け箇所の構造について説明する。   Next, the structure of the place where the base 16 is attached to the liner 12 on the valve side where the valve 17 is attached will be described.

口金１６は、ボス部２１と、このボス部２１の一端側に形成されたフランジ部２２とを有している。この口金１６のボス部２１は、貫通孔２４を有する筒状に形成されている。口金１６のフランジ部２２は、ライナ１２の外周側からライナ１２の肩部１５に重ね合わされて接するように固定されており、ボス部２１の貫通孔２４とライナ１２の挿通孔１２ａとが連通されている。   The base 16 has a boss portion 21 and a flange portion 22 formed on one end side of the boss portion 21. The boss portion 21 of the base 16 is formed in a cylindrical shape having a through hole 24. The flange portion 22 of the base 16 is fixed so as to overlap and contact the shoulder portion 15 of the liner 12 from the outer peripheral side of the liner 12, and the through hole 24 of the boss portion 21 and the insertion hole 12 a of the liner 12 communicate with each other. ing.

この口金１６のボス部２１の貫通孔２４には、その内周面に雌ネジ２５が形成されている。そして、この雌ネジ２５が形成された貫通孔２４にバルブ１７がねじ込まれて装着される。   A female screw 25 is formed on the inner peripheral surface of the through hole 24 of the boss portion 21 of the base 16. The valve 17 is screwed into the through hole 24 in which the female screw 25 is formed.

また、口金１６には、フランジ部２２における貫通孔２４側の縁部に、周方向へわたって段部２６が形成されている。   Further, a step portion 26 is formed in the base 16 at the edge of the flange portion 22 on the side of the through hole 24 over the circumferential direction.

この段部２６には、ライナ１２の挿通孔１２ａの縁部が収容されている。ライナ１２の挿通孔１２ａの縁部は、断面視で段部２６内に向かってＵ字状またはコ字状に屈曲されたシール部３１とされており、このシール部３１は、その外面が段部２６の内面に接触するように段部２６内に収容されている。また、シール部３１における内周側は、ガスタンク１１の内部へ向かって延びるシール片部３１ａとされており、このシール片部３１ａは、バルブ１７の口金１６への装着方向前方へ向かって中心へ窄まるように形成されている。   The step portion 26 accommodates an edge portion of the insertion hole 12 a of the liner 12. An edge portion of the insertion hole 12a of the liner 12 is a seal portion 31 bent in a U shape or a U shape toward the inside of the step portion 26 in a sectional view, and the outer surface of the seal portion 31 is stepped. It accommodates in the step part 26 so that the inner surface of the part 26 may be contacted. Further, the inner peripheral side of the seal portion 31 is a seal piece portion 31 a extending toward the inside of the gas tank 11, and this seal piece portion 31 a is centered forward in the mounting direction of the valve 17 on the base 16. It is formed to be constricted.

バルブ１７は、本体部３５と締結部３６とを有しており、締結部３６の一端側に本体部３５が設けられている。本体部３５は、口金１６の貫通孔２４よりも大径に形成されている。締結部３６は、その中間部における外周面に雄ネジ３７が形成されており、先端部における外周面がシール面３６ａとされている。   The valve 17 includes a main body portion 35 and a fastening portion 36, and the main body portion 35 is provided on one end side of the fastening portion 36. The main body 35 is formed to have a larger diameter than the through hole 24 of the base 16. The fastening portion 36 has a male screw 37 formed on the outer peripheral surface at the intermediate portion thereof, and the outer peripheral surface at the distal end portion serves as a seal surface 36a.

このバルブ１７は、その締結部３６が口金１６の貫通孔２４に挿し込まれ、この貫通孔２４の雌ネジ２５に雄ネジ３７を螺合することで口金１６に締結固定される。そして、このように口金１６に締結固定されたバルブ１７は、その先端部のシール面３６ａがライナ１２のシール部３１に挿し込まれ、シール面３６ａにシール部３１のシール片部３１ａが密着されている。   The valve 17 is fastened and fixed to the base 16 by having a fastening portion 36 inserted into the through hole 24 of the base 16 and screwing a male screw 37 into the female screw 25 of the through hole 24. Then, the valve 17 fastened and fixed to the base 16 in this way has the seal surface 36a at the tip thereof inserted into the seal portion 31 of the liner 12, and the seal piece portion 31a of the seal portion 31 is in close contact with the seal surface 36a. ing.

次に、口金１６にバルブ１７を装着する場合について説明する。   Next, a case where the valve 17 is attached to the base 16 will be described.

図２に示すように、口金１６のボス部２１側から締結部３６を口金１６側へ向けてバルブ１７を近づけ、締結部３６を口金１６の貫通孔２４へ挿し込む。   As shown in FIG. 2, the valve 17 is brought closer from the boss part 21 side of the base 16 toward the base 16 side, and the fastening part 36 is inserted into the through hole 24 of the base 16.

次に、締結部３６の雄ネジ３７を口金１６の貫通孔２４の雌ネジ２５に螺合させ、本体部３５が口金１６に当接するまでねじ込む。   Next, the male screw 37 of the fastening portion 36 is screwed into the female screw 25 of the through hole 24 of the base 16, and is screwed until the main body portion 35 contacts the base 16.

このようにすると、図３に示すように、バルブ１７は、雌ネジ２５に対する雄ネジ３７のねじ込みによって、ガスタンク１１の内部側へ移動し、締結部３６のシール面３６ａがライナ１２のシール部３１におけるシール片部３１ａに入り込む。   In this manner, as shown in FIG. 3, the valve 17 moves to the inside of the gas tank 11 by screwing the male screw 37 into the female screw 25, and the sealing surface 36 a of the fastening portion 36 is sealed with the sealing portion 31 of the liner 12. The seal piece portion 31a enters.

これにより、断面視Ｕ字状またはコ字状のシール部３１では、シール片部３１ａへのシール面３６ａの進入によって拡径するように外周側へ押圧されて弾性変形する。すると、締結部３６のシール面３６ａ方向へ向かってライナ１２のシール部３１の復元力（図３中矢印Ａで示す）が生じ、シール部３１のシール片部３１ａがシール面３６ａに密着してシールされる。   As a result, the U-shaped or U-shaped seal portion 31 in a sectional view is elastically deformed by being pressed toward the outer peripheral side so as to expand in diameter by the entry of the seal surface 36a into the seal piece portion 31a. Then, a restoring force (indicated by an arrow A in FIG. 3) of the seal portion 31 of the liner 12 is generated in the direction of the seal surface 36a of the fastening portion 36, and the seal piece portion 31a of the seal portion 31 is in close contact with the seal surface 36a. Sealed.

このようにしてバルブ１７を口金１６に装着したガスタンク１１内にガスが充填されると、充填されたガスの圧力がシール部３１のシール片部３１ａにおけるシール面３６ａとの密着側と反対側に作用することとなる。   When the gas tank 11 having the valve 17 attached to the base 16 is filled with gas in this way, the pressure of the filled gas is opposite to the side of the seal piece 31a of the seal portion 31 that is in close contact with the seal surface 36a. Will act.

これにより、図４に示すように、シール片部３１ａには、シール部３１の復元力による初期面圧に加えてガス圧による面圧（図４中矢印Ｂで示す）がシール面３６ａ方向に作用する。したがって、シール片部３１ａは、弾性力による初期面圧とガス圧でシール面３６ａに押し付けられて密着し、よって、バルブ１７とライナ１２との間が良好にシールされる。   As a result, as shown in FIG. 4, in addition to the initial surface pressure due to the restoring force of the seal portion 31, the surface pressure due to the gas pressure (indicated by arrow B in FIG. 4) is applied to the seal piece portion 31a in the direction of the seal surface 36a. Works. Therefore, the seal piece portion 31a is pressed against and closely contacts the seal surface 36a with the initial surface pressure and gas pressure due to the elastic force, and thus the valve 17 and the liner 12 are well sealed.

このように、上記実施形態に係るガスタンクによれば、バルブ１７が口金１６に装着されてシール面３６ａがライナ１２のシール部３１におけるシール片部３１ａに入り込むと、断面視Ｕ字状またはコ字状のシール部３１のシール片部３１ａが拡径するように外周側へ押圧されて弾性変形する。すると、シール面３６ａ方向へ向かってライナ１２のシール部３１の復元力が生じる。これにより、シール片部３１ａを、シール部３１の復元力によって大きな面圧でシール面３６ａに密着させ、優れたシール性を長期的に得ることができる。   Thus, according to the gas tank according to the above-described embodiment, when the valve 17 is mounted on the base 16 and the seal surface 36a enters the seal piece 31a in the seal portion 31 of the liner 12, the U-shaped or U-shaped cross-sectional view. The seal piece 31a of the shaped seal portion 31 is pressed toward the outer peripheral side so as to expand in diameter, and is elastically deformed. Then, a restoring force of the seal portion 31 of the liner 12 is generated in the direction of the seal surface 36a. Thereby, the seal piece part 31a can be brought into close contact with the seal surface 36a with a large surface pressure by the restoring force of the seal part 31, and excellent sealing performance can be obtained for a long time.

また、ガスタンク１１内にガスが充填されると、充填されたガスの圧力がシール部３１のシール片部３１ａにおけるシール面３６ａとの密着側と反対側に作用する。これにより、シール片部３１ａには、シール部３１の復元力による初期面圧に加えてガス圧による面圧がシール面３６ａ方向に作用する。したがって、シール片部３１ａが、弾性力による初期面圧とガス圧でシール面３６ａに押し付けられて密着され、よって、優れたシール性をさらに長期的に得ることができる。   When the gas tank 11 is filled with gas, the pressure of the filled gas acts on the side of the seal piece 31 a of the seal portion 31 that is opposite to the close contact side with the seal surface 36 a. Thereby, in addition to the initial surface pressure due to the restoring force of the seal portion 31, the surface pressure due to the gas pressure acts on the seal piece portion 31a in the direction of the seal surface 36a. Therefore, the seal piece portion 31a is pressed against and closely adhered to the seal surface 36a with the initial surface pressure and the gas pressure due to the elastic force, and thus excellent sealing performance can be obtained for a longer period.

次に変形例について説明する。   Next, a modified example will be described.

（変形例１）
図５に示すように、変形例１では、ライナ１２のシール部３１における凹部３１ｂに、シール片部３１ａをバルブ１７のシール面３６ａ方向へ付勢する弾性部材４１を設けている。この弾性部材４１としては、金属や樹脂からなるバネ、またはゴムなどが用いられる。 (Modification 1)
As shown in FIG. 5, in the first modification, an elastic member 41 that urges the seal piece portion 31 a toward the seal surface 36 a of the valve 17 is provided in the recess 31 b of the seal portion 31 of the liner 12. As the elastic member 41, a spring made of metal or resin, rubber, or the like is used.

この変形例１では、バルブ１７が口金１６に装着されてシール面３６ａがライナ１２のシール部３１におけるシール片部３１ａに入り込むと、断面視Ｕ字状またはコ字状のシール部３１のシール片部３１ａが拡径するように外周側へ押圧されて弾性変形するとともに、シール部３１の凹部３１ｂに設けられた弾性部材４１も圧縮されて弾性変形する。すると、締結部３６のシール面３６ａ方向へ向かってライナ１２のシール部３１及び弾性部材４１の復元力が生じる。これにより、シール片部３１ａは、シール部３１及び弾性部材４１の復元力によって大きな面圧でシール面３６ａに密着してシールされる。   In the first modification, when the valve 17 is mounted on the base 16 and the seal surface 36a enters the seal piece 31a in the seal portion 31 of the liner 12, the seal piece of the seal portion 31 having a U-shape or a U-shape in cross-section. The elastic member 41 is pressed and elastically deformed so as to expand the diameter of the portion 31a, and the elastic member 41 provided in the concave portion 31b of the seal portion 31 is also compressed and elastically deformed. Then, the restoring force of the seal portion 31 and the elastic member 41 of the liner 12 is generated in the direction of the seal surface 36 a of the fastening portion 36. As a result, the seal piece 31 a is tightly sealed to the seal surface 36 a with a large surface pressure by the restoring force of the seal portion 31 and the elastic member 41.

また、この変形例１の場合も、ガスタンク１１内にガスが充填されると、充填されたガスの圧力がシール部３１のシール片部３１ａにおけるシール面３６ａとの密着側と反対側に作用する。これにより、シール片部３１ａには、シール部３１及び弾性部材４１の復元力による初期面圧に加えてガス圧による面圧がシール面３６ａ方向に作用する。したがって、シール片部３１ａは、弾性力による初期面圧とガス圧でシール面３６ａに押し付けられて密着し、よって、バルブ１７とライナ１２との間が良好にシールされる。   Also in the case of the first modification, when the gas is filled in the gas tank 11, the pressure of the filled gas acts on the side of the seal piece 31 a of the seal portion 31 that is opposite to the close contact side with the seal surface 36 a. . Thereby, in addition to the initial surface pressure due to the restoring force of the seal portion 31 and the elastic member 41, the surface pressure due to the gas pressure acts on the seal piece portion 31a in the direction of the seal surface 36a. Therefore, the seal piece portion 31a is pressed against and closely contacts the seal surface 36a with the initial surface pressure and gas pressure due to the elastic force, and thus the valve 17 and the liner 12 are well sealed.

（変形例２）
図６に示すように、変形例２では、ライナ１２のシール部３１に、シール片部３１ａをバルブ１７のシール面３６ａ方向へ付勢する断面視Ｕ字状またはコ字状の弾性部材４２を一体成形している。この弾性部材４２としては、金属や樹脂からなるバネ、またはゴムなどが用いられる。 (Modification 2)
As shown in FIG. 6, in the second modified example, the U-shaped or U-shaped elastic member 42 that urges the seal piece 31 a toward the seal surface 36 a of the valve 17 is provided on the seal portion 31 of the liner 12. It is integrally molded. As the elastic member 42, a spring made of metal or resin, rubber, or the like is used.

この変形例２では、バルブ１７が口金１６に装着されてシール面３６ａがライナ１２のシール部３１におけるシール片部３１ａに入り込むと、断面視Ｕ字状またはコ字状のシール部３１のシール片部３１ａが拡径するように外周側へ押圧されて弾性変形するとともに、シール部３１に一体化された弾性部材４２も同様に弾性変形する。すると、締結部３６のシール面３６ａ方向へ向かってライナ１２のシール部３１及び弾性部材４２の復元力が生じる。これにより、シール片部３１ａは、シール部３１及び弾性部材４２の復元力によって大きな面圧でシール面３６ａに密着してシールされる。   In the second modification, when the valve 17 is mounted on the base 16 and the seal surface 36 a enters the seal piece 31 a in the seal portion 31 of the liner 12, the seal piece of the U-shaped or U-shaped seal portion 31 in sectional view. The elastic member 42 is elastically deformed in the same manner as it is pressed toward the outer peripheral side so as to expand the diameter of the portion 31a and is elastically deformed. Then, the restoring force of the seal portion 31 of the liner 12 and the elastic member 42 is generated toward the seal surface 36a of the fastening portion 36. As a result, the seal piece portion 31a is tightly sealed to the seal surface 36a with a large surface pressure by the restoring force of the seal portion 31 and the elastic member 42.

また、この変形例２の場合も、ガスタンク１１内にガスが充填されると、充填されたガスの圧力がシール部３１のシール片部３１ａにおけるシール面３６ａとの密着側と反対側に作用する。これにより、シール片部３１ａには、シール部３１及び弾性部材４２の復元力による初期面圧に加えてガス圧による面圧がシール面３６ａ方向に作用する。したがって、シール片部３１ａは、弾性力による初期面圧とガス圧でシール面３６ａに押し付けられて密着し、よって、バルブ１７とライナ１２との間が良好にシールされる。   Also in the second modification, when the gas is filled into the gas tank 11, the pressure of the filled gas acts on the side of the seal piece 31 a of the seal portion 31 that is opposite to the close contact side with the seal surface 36 a. . Thereby, in addition to the initial surface pressure due to the restoring force of the seal portion 31 and the elastic member 42, the surface pressure due to the gas pressure acts on the seal piece portion 31a in the direction of the seal surface 36a. Therefore, the seal piece portion 31a is pressed against and closely contacts the seal surface 36a with the initial surface pressure and gas pressure due to the elastic force, and thus the valve 17 and the liner 12 are well sealed.

なお、上記実施形態では締結部材としてバルブ１７を例示して説明したが、締結部材は、口金１６の貫通孔２４を閉塞する栓部材であっても良いことは勿論である。   In the above embodiment, the valve 17 is exemplified as the fastening member, but the fastening member may be a plug member that closes the through hole 24 of the base 16.

１１…ガスタンク、１２…ライナ、１２ａ…挿通孔、１５…肩部、１６…口金、１７…バルブ（締結部材）、２２…フランジ部、２４…貫通孔、２５…段部、３１…シール部、３１ａ…シール片部、３６ａ…シール面 DESCRIPTION OF SYMBOLS 11 ... Gas tank, 12 ... Liner, 12a ... Insertion hole, 15 ... Shoulder part, 16 ... Base, 17 ... Valve (fastening member), 22 ... Flange part, 24 ... Through-hole, 25 ... Step part, 31 ... Seal part, 31a ... seal piece, 36a ... seal surface

Claims (1)

樹脂製のライナと、該ライナの少なくとも一端に設けられた口金と、該口金に形成された貫通孔にねじ込まれて装着される締結部材とを備え、
前記口金は、前記ライナの肩部に外側から接するフランジ部と、該フランジ部における前記貫通孔側の縁部に形成された段部とを有し、
前記ライナは、前記貫通孔と連通する挿通孔と、該挿通孔の縁部が断面視Ｕ字状またはコ字状に屈曲されて前記段部に収容され、内周側が前記締結部材の前記口金への装着方向へ向かって次第に窄まるシール片部とされたシール部とを有し、
前記締結部材は、前記貫通孔に締結されることで前記ライナのシール部における前記シール片部に密着されるシール面を有し、
前記シール部は、前記締結部材のシール面によって前記シール片部が外周側へ押圧されて弾性変形されるガスタンク。 A resin liner, a base provided at at least one end of the liner, and a fastening member that is screwed into a through hole formed in the base;
The base has a flange portion in contact with the shoulder portion of the liner from the outside, and a step portion formed at an edge portion on the through hole side in the flange portion,
The liner includes an insertion hole communicating with the through-hole, an edge portion of the insertion hole bent into a U-shape or a U-shape in cross-section and accommodated in the stepped portion, and an inner peripheral side of the base of the fastening member A seal piece that gradually narrows toward the mounting direction to the seal part,
The fastening member has a seal surface that is brought into close contact with the seal piece portion of the seal portion of the liner by being fastened to the through hole,
The seal portion is a gas tank that is elastically deformed by pressing the seal piece portion toward the outer peripheral side by a seal surface of the fastening member.
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